Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon showing our new design; and,

FIG. 2 is another front view thereof in which a display screen in broken lines is provided to illustrate an example environment.

The broken line showing of the display screen is for environmental purposes only and forms no part of the claimed design.

The dot dash lines in the figures represent an unclaimed boundary line and form no part of the claimed design. 

CLAIM We claim the ornamental design for a display screen or portion thereof with icon, as shown and described. 